f'shizzle my n'izzle
It just means for sure my nigga! Simple as that, but no one can say it without sounding like a joke.
She just got a new car, f'shizzle my n'izzle.
He just told the teacher to shut up, f'shizzle my n'izzle.
I just got a 100 on the test, f'shizzle my n'izzle.